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Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Owner	Pascale Cartrain	England	1 2 3 4 5
2	Accounting Manager	Jaime Yorres	France	1 2 3 4 5
3	Accountant	Matti Karttunen	Italy	1 2 3 4 5
4	Sales Agent	Antonio Moreno	Brazil	1 2 3 4 5
5	Sales Consultant	Elizabeth Lincoln	England	1 2 3 4 5
6	Accountant	Jaime Yorres	France	1 2 3 4 5
7	Marketing Assistant	Georg Pipps	Germany	1 2 3 4 5
8	Sales Representative	Elizabeth Lincoln	Germany	1 2 3 4 5
9	Marketing Manager	Antonio Moreno	Austria	1 2 3 4 5
10	Sales Consultant	Patricio Simpson	Austria	1 2 3 4 5
11	Sales Consultant	Antonio Moreno	England	1 2 3 4 5
12	Owner	Elizabeth Lincoln	Germany	1 2 3 4 5
13	Sales Manager	Elizabeth Lincoln	France	1 2 3 4 5
14	Sales Associate	Paul Henriot	USA	1 2 3 4 5
15	Sales Associate	Hanna Moos	Brazil	1 2 3 4 5
16	Sales Manager	Pascale Cartrain	Brazil	1 2 3 4 5
17	Sales Consultant	Hanna Moos	Bulgaria	1 2 3 4 5
18	Sales Agent	Antonio Moreno	Spain	1 2 3 4 5
19	Sales Manager	Howard Snyder	France	1 2 3 4 5
20	Sales Manager	Georg Pipps	USA	1 2 3 4 5
21	Owner	Georg Pipps	USA	1 2 3 4 5
22	Sales Representative	Paul Henriot	Brazil	1 2 3 4 5
23	Marketing Manager	Pascale Cartrain	England	1 2 3 4 5
24	Sales Agent	Elizabeth Lincoln	Germany	1 2 3 4 5
25	Accounting Manager	Matti Karttunen	Argentina	1 2 3 4 5
26	Sales Associate	Matti Karttunen	Austria	1 2 3 4 5
27	Accounting Manager	Antonio Moreno	Bulgaria	1 2 3 4 5
28	Sales Representative	Pascale Cartrain	Brazil	1 2 3 4 5
29	Sales Agent	Paul Henriot	Spain	1 2 3 4 5
30	Sales Consultant	Matti Karttunen	Germany	1 2 3 4 5
31	Sales Manager	Elizabeth Lincoln	Austria	1 2 3 4 5
32	Sales Representative	Paul Henriot	Brazil	1 2 3 4 5
33	Marketing Assistant	Antonio Moreno	USA	1 2 3 4 5
34	Marketing Manager	Matti Karttunen	Spain	1 2 3 4 5
35	Accounting Manager	Patricio Simpson	USA	1 2 3 4 5
36	Marketing Manager	Patricio Simpson	England	1 2 3 4 5
37	Accountant	Antonio Moreno	Italy	1 2 3 4 5
38	Sales Consultant	Patricio Simpson	Brazil	1 2 3 4 5
39	Sales Manager	Georg Pipps	Italy	1 2 3 4 5
40	Accounting Manager	Georg Pipps	Austria	1 2 3 4 5
41	Sales Associate	Pascale Cartrain	Brazil	1 2 3 4 5
42	Sales Representative	Pascale Cartrain	Austria	1 2 3 4 5
43	Sales Consultant	Jaime Yorres	France	1 2 3 4 5
44	Marketing Manager	Antonio Moreno	Bulgaria	1 2 3 4 5
45	Sales Associate	Georg Pipps	Italy	1 2 3 4 5
46	Accounting Manager	Hanna Moos	Austria	1 2 3 4 5
47	Sales Consultant	Antonio Moreno	Italy	1 2 3 4 5
48	Owner	Pascale Cartrain	USA	1 2 3 4 5
49	Sales Consultant	Antonio Moreno	Argentina	1 2 3 4 5
50	Sales Consultant	Patricio Simpson	Brazil	1 2 3 4 5
51	Accounting Manager	Paul Henriot	USA	1 2 3 4 5
52	Sales Manager	Antonio Moreno	USA	1 2 3 4 5
53	Sales Agent	Jaime Yorres	USA	1 2 3 4 5
54	Marketing Manager	Howard Snyder	Italy	1 2 3 4 5
55	Accountant	Matti Karttunen	Austria	1 2 3 4 5
56	Marketing Assistant	Paul Henriot	Argentina	1 2 3 4 5
57	Accountant	Matti Karttunen	Argentina	1 2 3 4 5
58	Accountant	Pascale Cartrain	Spain	1 2 3 4 5
59	Sales Representative	Georg Pipps	Argentina	1 2 3 4 5
60	Sales Representative	Matti Karttunen	Argentina	1 2 3 4 5
61	Sales Associate	Hanna Moos	France	1 2 3 4 5
62	Sales Associate	Hanna Moos	USA	1 2 3 4 5
63	Accountant	Georg Pipps	Spain	1 2 3 4 5
64	Sales Manager	Elizabeth Lincoln	Spain	1 2 3 4 5
65	Sales Manager	Howard Snyder	France	1 2 3 4 5
66	Sales Associate	Patricio Simpson	Spain	1 2 3 4 5
67	Sales Agent	Hanna Moos	Austria	1 2 3 4 5
68	Owner	Paul Henriot	England	1 2 3 4 5
69	Marketing Assistant	Hanna Moos	Brazil	1 2 3 4 5
70	Owner	Howard Snyder	France	1 2 3 4 5
71	Sales Agent	Antonio Moreno	France	1 2 3 4 5
72	Accountant	Hanna Moos	Italy	1 2 3 4 5
73	Marketing Manager	Georg Pipps	Argentina	1 2 3 4 5
74	Accounting Manager	Georg Pipps	England	1 2 3 4 5
75	Marketing Assistant	Antonio Moreno	Spain	1 2 3 4 5
76	Sales Consultant	Jaime Yorres	Italy	1 2 3 4 5
77	Marketing Assistant	Elizabeth Lincoln	Italy	1 2 3 4 5
78	Sales Consultant	Matti Karttunen	Germany	1 2 3 4 5
79	Sales Associate	Howard Snyder	England	1 2 3 4 5
80	Accountant	Elizabeth Lincoln	USA	1 2 3 4 5
81	Owner	Paul Henriot	France	1 2 3 4 5
82	Marketing Assistant	Pascale Cartrain	Bulgaria	1 2 3 4 5
83	Accountant	Hanna Moos	Italy	1 2 3 4 5
84	Sales Manager	Matti Karttunen	France	1 2 3 4 5
85	Marketing Assistant	Patricio Simpson	USA	1 2 3 4 5
86	Marketing Manager	Jaime Yorres	Brazil	1 2 3 4 5
87	Sales Consultant	Antonio Moreno	Brazil	1 2 3 4 5
88	Accounting Manager	Howard Snyder	Italy	1 2 3 4 5
89	Owner	Georg Pipps	Italy	1 2 3 4 5
90	Sales Associate	Paul Henriot	Brazil	1 2 3 4 5
91	Sales Agent	Georg Pipps	France	1 2 3 4 5
92	Marketing Manager	Hanna Moos	USA	1 2 3 4 5
93	Marketing Manager	Patricio Simpson	Spain	1 2 3 4 5
94	Sales Representative	Jaime Yorres	England	1 2 3 4 5
95	Sales Agent	Elizabeth Lincoln	USA	1 2 3 4 5
96	Sales Agent	Howard Snyder	Bulgaria	1 2 3 4 5
97	Accounting Manager	Antonio Moreno	England	1 2 3 4 5
98	Sales Manager	Patricio Simpson	Bulgaria	1 2 3 4 5
99	Marketing Manager	Elizabeth Lincoln	Italy	1 2 3 4 5
100	Sales Representative	Elizabeth Lincoln	France	1 2 3 4 5


...41 42 43 44 45 46 47 48 49 50 ... Item 47001 to 48000 of 300000 Page: of 300 GoPage size:

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Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="vb" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.GridExamplesVBNET.Performance.Virtualization.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

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